Neil Lennon admits David Gray has surprised him this season but warned that his former player’s in-form Hibernian team face an “imperious” Celtic in Sunday’s Scottish Cup clash. Hibs will arrive at Celtic Park on the back of a 15-game unbeaten run which includes a recent home win against the champions.

The two form sides in Scotland meet in the Scottish Cup quarter-finals on Sunday as Celtic host resurgent Hibs. Treble-chasing Celtic are cruising towards another league title and have already secured the League Cup,

Nick Walsh will have the whistle for a match involving Celtic for the sixth time this season, having previously taken charge of four Scottish Premiership matches, including a game against Hibs at Easter Road last August, and also the recent Scottish Cup match against Kilmarnock at Celtic Park, which Brendan Rodgers’ side won 2-1.